#include<iostream>
using namespace std;
class CCar;
class CDriver
{
	public:
		void ModifyCar(CCar*pCar);
 };
 class CCar 
 {
 	private:
 		int price;
 	friend int MostExpensiveCar(CCar cars[],int total);
 	friend void CDriver::ModifyCar(CCar*pCar);
 };
 void CDriver::ModifyCar(CCar*pCar)
 {
 	pCar->price +=1000;
 }
 int MostExpensiveCar(CCar cars[],int total)
 {
 	int tmpMax=-1;
 	for(int i=0;i<total;++i)
 	if(cars[i].price>tmpMax)
 	tmpMax=cars[i].price;
 	return tmpMax;
 }
 int main()
 {
 	return 0;
 }
